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AbstractAbstract
[en] A calculation of the electrical conductivity for Hubbard materials is presented which is valid when U/t >> 1 (U being the Coulomb repulsion and t the nearest neighbor hopping energy) for arbitrary electron concentration and temperature. The derivation emploies the single particle Green's functions with real and imaginary times instead of the usual two-particle real time Green's function. The result is compared with the experimental data available for some organic charge transfer salts
[pt]
Apresentamos um calculo da condutividade eletrica para 'materiais de Hubbard' valido quando U/t >> 1 (U sendo a repulsao Coulombiana, e t a energia de transferencia para vizinhos proximos) para quaisquer concentracao eletronica e temperatura. A deducao emprega as funcoes de Green com tempos real e imaginario, em vez do metodo usual que emprega a funcao de Green de duas particulas. O resultado e comparado com dados experimentais disponiveis para alguns sais organicos com transferencia de cargaSource
nd; 24 p
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